In Quake III: Team Arena, a base model
marks the location of each of the four persistent Team Power-Ups (Ammo
Regen, Guard, Doubler, and Scout). These models are not generated
programmatically (as is the case with the obelisks and flag bases) and
must be placed in the game maps by the mapmaker. Position the model such
that the center of its origin sits on top of the floor and so that it is
centered beneath the Team Power-Up. There are separate models for the
blue and red team sides. If you choose to place a powerup in neutral
territory (as in MPTERRA3), place a weaponpad_neutral.pfb under the
powerup.

Copy the spawn folder into the models/mapobjects
directory in your missionpack directory (if necessary, create all three
directories now). Do not create a new directory for them. Shader scripts
and textures for these models are already a part of the Mission Pack pak
file and need not be added separately.